EP 2237913 B9 20140416 - DRILLING TOOL HAVING POINT THINNING
Title (en)
DRILLING TOOL HAVING POINT THINNING
Title (de)
BOHRWERKZEUG MIT AUSSPITZUNG
Title (fr)
OUTIL DE PERÇAGE ET POINTE CORRESPONDANTE
Publication
Application
Priority
- EP 2009000170 W 20090114
- DE 102008004564 A 20080115
Abstract (en)
[origin: WO2009090042A2] The invention relates to a drilling tool (1), a) which can be rotated about a central tool axis (A), b) has at least two main cutters (10, 50) disposed on a front (I b) and transitioning into at least one cross-cutter (11, 51, 11 ', 51 ', 11 ', 51 ') in an inward direction toward the tool axis (A), c) wherein the cross-cutter (11, 51, 11 ', 51 ', 11 ', 51 ') extends in or across a central region (4) on the front (I a) surrounding the tool axis (A), d) wherein the cross-cutter (11, 51, 11 ', 51 ', 11 ', 51 ') forms a residual cross-cutter (11a) in the innermost region extending through the region of the tool axis or in the region thereof, and/or on the interior thereof, adjacent to a point thinning region (21, 61), e) wherein cutter corners (17, 57) are configured at the ends of the main cutters (10, 50) positioned on the outside, f) wherein a straight connecting line (2) is defined, which extends through two cutters corners (17, 57) of main cutters (10, 50) positioned opposite each other with regard to the tool axis (A), or which, in the absence of an opposite main cutter, extends through a cutter corner (17, 57) and the tool axis (A), g) wherein a cross-cutter interior region extends away from the outer end of the residual cross-cutter (11a', 51 a'; 11a', 51a') within a region (D', D') at an angle between -15° and +15° with regard to a parallel (m) to the connecting line (2), and particularly has a length of 1/100 to 1/10 of the drill diameter B, preferably up to the base side (F', F') of the region (D', D').
IPC 8 full level
B23B 51/02 (2006.01)
CPC (source: EP US)
B23B 51/02 (2013.01 - EP US); Y10T 408/45 (2015.01 - EP US); Y10T 408/909 (2015.01 - EP US); Y10T 408/9095 (2015.01 - EP US); Y10T 408/9097 (2015.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
DE 102008004564 A1 20090723; DE 102008004564 B4 20130411; CN 101970158 A 20110209; CN 101970158 B 20130904; EP 2237913 A2 20101013; EP 2237913 B1 20131023; EP 2237913 B9 20140416; JP 2011509838 A 20110331; JP 5466177 B2 20140409; US 2010322726 A1 20101223; US 8858134 B2 20141014; WO 2009090042 A2 20090723; WO 2009090042 A3 20091015
DOCDB simple family (application)
DE 102008004564 A 20080115; CN 200980109043 A 20090114; EP 09702023 A 20090114; EP 2009000170 W 20090114; JP 2010542576 A 20090114; US 81286409 A 20090114